How many use refillable inks for the Epson 3880?

Just wanted to see how many people out there use 3rd party refillable inks for the Epson 3880 as opposed to the (highly) more expensive Epson inks. I use mainly hahnemuhle and Red River paper, will I need to re-profile everything if I use the 3rd party inks? I am running low on my initial cartridges and trying to figure out what would be best for me. I dont mind using the refillable cartridges if I don't have to make custom profiles again for the paper (I only have a screen calibrator). Do you guys notice much difference in quality?? Thanks in advance!!